James b



(N0 Model.)

JfB. COLT;

l LAMP BURNER. 10.502,704.

mente@ Aug. 8,- V 1893. f

*MEE- WIT/VESES:

Afro/MEV described, and claimed.

STATES ATENT e LAMPeBURNER.

SPECIFICATION forming part of Letters Patent No. 502,704, dated Augusts, 1893.

Application sled Meret 11, 189,1.

To a/ZZ whom it may concern:

Be it known that I, JAMES B. COLT, a citizen of the United States, and aresident of New York, in the county and State of New York, have inventedcertain new and useful@ Improvements in Lamp-Burners, of which thefollowing is a specication, reference being' had to the accompanyingdrawings, formingl part hereof.

My invention relates to illuminating lamps, particularly to center draftlamps and consists of a lamp burner, constructed, arranged and combined,in the manner herein shown,

` The object of my invention is to produce a bright and steadycylindrical flame by means of a disk or deflector in the center of theburner and yet avoid the shadowvand other bad eects due to a Vbuttonplaced in the midst of the flame. v

When lamps of the latter construction. are used in magic lanterns, animage or a shadow4 of the central button` is thrown upon the screenrendering such forms of lamps objec tionable, though, owing to thecomplete com; bustion produced in them, they are inmany respectspeculiarly adapted "for such work. By my invention, however,-Icompletelydo away with this objection, and Iaccomplish my purposebymeans of a deflecting or distributing disk, placed below thev upper edgeof an opaque deflection cone, as illustrated in the accompanyingdrawings'wherein* Figure l. is a side elevation partly in section of acomplete lamp, and Fig. 2. is an elevation of the lamp burner proper.

Like letters of reference designate like parts. p

B is the lamp reservoir ofany desired form, and C the wick chamber,preferablyof circular form, surrounded by the usual, 0r any desirable,air-distributing chamber D. The air enters the central chamber'from theopening c through the side of the wick chamber and passes up through thevertical tube c to the upper end of the Wick chamber. In the centerchamber is placed a holder of any desired form, for my central deliectorE. I prefer to make this as shown in the form of a central tube or tubesF, F in the upper ends of which is held the pin, or other support, e, ofmy censerin No. 391,676. (No model.)

tral deflector. My delector disk is preferably perforated. 'When inposition, its periphery is somewhat above the top of the wick chamber.About the outside of the upper end of the wick chamber is thev usualgrated distributing cone G, through which theouter draft rises. Aroundthis, and eX- tending above my detlector disk, I place an opaquedeliecting cone H, which curves in, toward, and above, the disk.

` yI inclose my burner, when in use for magic lanterns, in theparaboloidal case I with a glass front K. Thus I obtain both a reiiectorand a combustion chamber in a single metallic piece. A similarform ofcombustion chamber I have shown in my prior patents, and therefore I donot lay claim herein to the same; but Ilind that with my new form ofconcentrating burner it serves in a new relation since, in throwingparallel rays, an absolute vshadow.(so far as the reflector isconcerned) would be thrown forward with any other form of deecting disk,while with any other systemof flame deflection, nosatisfactorycondensation of focus is attained. I consider this combination,therefore, of Vpeculiar advantage in the mutual co-action of the`several parts. My chimney L rises from, and in continuation of, thecombustion chamber thus leaving the amefbetween the burner and the roofof the case, uninclosed by a chimney. When my lamp is burning, thecentral column of air rises from the central passage to the flame. Hereit is deiiected by the disk E toward the cone H and meets the currentrising fromthe outer distributer G, whereby the flame kis spread and thecombustion is facilitated. The iiame,rwith the two columns of v air,deflected first outward by the disk E, and then condensed by the cone H,rises fromthe top of the opaque cone toward thezchimney as a brightsteady cylinder, somewhat-asindicated in the drawings in dotted lines.Th'e perforations in the central deiiector serve to,

allow more air to pass up lfrom the center and prevent the vibrationthat 'is sometimes caused by the rarefaction in the space just above thecenter of the disk. This featureis not however essential.

My burner differs from a burner having two deflectors in the same plane,because in IOO the latter there is neither expansion to give combustionnor condensation to give intensity, for the deiecting tendenciesneutralize each other and only great steadiness results. My inventiondiers also from burners having glass chimneys provided with a sphericalportion and a button or deilector for increasing the size of the flamewithin such spherical portion. Expansion and not condensation is theresult desired on such forms, and the flame cannot be raised into thecylindrical portion of the chimney without smoking. The flame producedis a soft sphere or rather lower hemisphere of light upon a shortcolumn, Whereas my flame is expanded at the very moment it leaves theWick, in order to receive the greatest amount of oxygen and thencondensed to burn and give forth light after passing the top of theopaque cone. The only visible portion of the flame is therefore thecylinder projecting from the cone.

It is obviousthat my invention may be used and applied to a greatvariety of burners, but,

Having described one form of myinvention and hors7 it may be used, Iclaim, broadlyl. In combination, an Argand or central draftburner, acentral button supported above the Wick thereof, for projecting thellame beyond the annular Wick, and an opaque deiector extending abovethe said button and over the said Wick, substantially as set forth.

2. The combination of an Argand lamp burner provided Witha centraldedecting disk or button for expanding the :flame immediately above thewick, and provided with an opaque deilecting cone or screen extendingabove the button and over the Wick, and a paraboloidal reflectorprovided with a transparent front and forming a combustion chamber forthe said burner, substantially as, and for the purposes set forth.

In testimony whereof I hereunto set my hand.

` JAMES B. COLT. Witnesses:

G. M. PLYMP'roN, HAROLD BINNEY.

